Item TypeCoulomb Meter ModelVAC9010H Current measurement range0-100A Display resolution0.1A Voltage measurement rangeSelf-powered (12-90)V, external power supply (0-90)V Current accuracy3%5-digit Voltage accuracy2%5-digit Display resolutionVoltage0.01V Capacity0.01AH Time0.01H(1min) Measurement rate5 times / sec Protection type and settingOVP (overvoltage protection)0.01V-90V OPP (overpower protection)0.01W9.99KW LOP (undervoltage protection)0.01V~90V OCP (overcurrent protection)0.1~100A OAH (overcharge protection)0.01AH-9999AH OFT (Timeout Protection)1min-99hour 59min Dimensions (length width height)79 x 43 x 52mm / 3.1 x 1.7 x 2in Mounting hole opening (mm)76.5 x 39.2mm / 3 x 1.5in1Scope of application: Electric vehicles, car battery charge and discharge monitoring, photovoltaic system power monitoring, etc. 2Bidirectional detection of current, for users who detect charge and discharge can automatically identify and detect bidirectional current without changing the wiring direction. 3Power-off memory function, after power-off, can remember the number of AH before power-off, which is convenient for observation and measurement. 4The time and AH count clear function does not affect the next measurement. 5The AH number can be filled up without affecting the direct discharge metering. 6Voltage, current, charging capacity AH number, WH number, time and power are displayed at the same time, and the display information is comprehensive and clear. 7With output shutdown function key, flexible turn on or off output (requires relay). 8With overvoltage protection, overcurrent protection, overpower protection, time limit protection, overcharge protection and other protection functions. 9The current is detected by the Hall sensor, and the current passing through the hole of the sensor can be detected, and the current can be detected in both the forward and reverse directions, which is safe and convenient. 1 x Coulomb Meter1 x Display1 x Wiring Wire